Porte coulissante

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bonjour
je suis en train de fabriquer une porte coulissante sur galets que je voudrais l'ouvrir et la fermer à une certaine heure (je dispose d un ds1307, d un l298d, d'un motoreducteur. mais le probleme est que je n arrive pas trouver la fonction qui me permette de faire tourner le moteur tant que la fin de course n est pas atteinte si l heure correspond .
entre les if/else c est ok , mais pour le while (tant que microrupteur low par exemple faire tourner moteur ....) je n ai pas trouvé de solution
merci pour votre aide
giloris

regardez par exemple dans les projets finis les travaux sur les portes de poulailler


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